<!doctype html>
<html>
  <head>
    <title>ComplicatedTable</title>
  </head>
  <body>
    <table border="2px" cellpadding="5">
      <colgroup>
        <col width="20%" />
        <col width="20%" />
        <col width="20%" />
        <col width="20%" />
        <col width="20%" />
      </colgroup>
      <tbody>
        <tr align="center">
          <td colspan="3">Title goes here</td>
          <td>A</td>
          <td>B</td>
        </tr>
        <tr align="center">
          <td rowspan="3">C</td>
          <td>D</td>
          <td>E</td>
          <td>F</td>
          <td>G</td>
        </tr>
        <tr align="center">
          <td>H</td>
          <td colspan="2">I</td>
          <td rowspan="2">J</td>
        </tr>
        <tr align="center">
          <td>K</td>
          <td>L</td>
          <td>M</td>
        </tr>
        <tr align="center">
          <td>N</td>
          <td colspan="4">O</td>
        </tr>
      </tbody>
    </table>
  </body>
</html>